** Next:** but are they consistent?
** Up:** THE DOUBLE ELLIPTIC APPROXIMATION...
** Previous:** in the impulse-response domain

There is no such problem in the dispersion-relation domain, since
triplications are impossible there.
Figure shows how the three approximations shown
in Figure work in the dispersion-relation domain.
Just like elliptical anisotropy,
Muir's four-parameter approximation is calculated
in the dispersion-relation domain
by simply using slownesses instead of velocities
in the same approximation formula.
Note in Figure that the
double-elliptic approximation in the dispersion-relation domain
is nearly exact for this example.

** Next:** but are they consistent?
** Up:** THE DOUBLE ELLIPTIC APPROXIMATION...
** Previous:** in the impulse-response domain
Stanford Exploration Project

12/18/1997